USFS National Forest System Trails · Salmon-Challis National Forest · Idaho · Updated June 2026
Mckay-Eleven (USFS trail 4151) is a 4.6 mi trail in Salmon-Challis National Forest, Idaho. Mountain-bike use here is accepted but discouraged in USFS data, with Class 1 e-bikes also designated.
Can I bike Mckay-Eleven?
| Use | Status | Season on record |
|---|---|---|
| Mountain bike | Accepted but discouraged | — |
| Class 1 e-bike (pedal-assist, 20 mph) | Allowed | Jul–Sep |
| Class 2 e-bike (throttle, 20 mph) | Allowed | Jul–Sep |
| Class 3 e-bike (pedal-assist, 28 mph) | Allowed | Jul–Sep |
Zooming out: across Salmon-Challis National Forest, 26% of rideable trail miles are open to mountain bikes — a Bike Access Grade of C.
Watch Salmon-Challis National Forest for access changes
Email me when USFS mountain-bike or e-bike designations change for trails in Salmon-Challis National Forest. Free, unsubscribe anytime.
About this trail
Mckay-Eleven (USFS trail 4151) runs 4.6 mi through Salmon-Challis National Forest in Idaho. The figures here are pulled from the official US Forest Service trail data for Salmon-Challis National Forest, covering the trail's mileage, tread, grade band, and the bike and e-bike uses the agency lists as designated. The tread is mapped as native material. Based on slope, this is a Advanced trail (grade band +12-20%); that reflects steep gradient and is not the same as a technical MTB difficulty rating. Note that mountain-bike use here is discouraged in USFS records — confirm with the ranger district before riding. On the electric side, Class 1, Class 2, Class 3 e-bikes are also designated (Jul–Sep) — Class 1 being pedal-assist only, Classes 2 and 3 adding a throttle and higher assisted speed. The route is mapped as USFS Trail Class 2 on the agency's 1-to-5 development scale, where 1 is the most primitive, minimally maintained tread and 5 is the most developed. Because conditions, closures, and local orders change between data refreshes, confirm the current status with the managing ranger district before you ride.
Frequently asked questions
- Can you mountain bike on Mckay-Eleven?
- Mountain-bike use on Mckay-Eleven is discouraged in USFS records, though Class 1 e-bike use is designated. Confirm current rules with the managing ranger district.
- Are e-bikes allowed on Mckay-Eleven?
- Class 1, Class 2, Class 3 e-bikes are designated on Mckay-Eleven in the USFS data.
- How long is Mckay-Eleven?
- Mckay-Eleven measures about 4.6 mi in total, summed across its mapped National Forest System segments.
- What is the surface of Mckay-Eleven?
- USFS data records the tread surface of Mckay-Eleven as native material.
- How difficult is Mckay-Eleven?
- Its grade-based difficulty is Advanced (grade band +12-20%), derived from USFS slope data. This reflects steepness, not technical mountain-bike difficulty.
How we read this data
Grade-based difficulty above is the USFS grade (route steepness), not a technical mountain-bike rating — a gentle-grade trail can still be rocky or technical, and vice versa. Bike and e-bike status come verbatim from the USFS managed-use fields for this trail; we never infer access we can't cite. See our methodology for how the dataset is built and what each field means.
Where it is
Approximate location of Salmon-Challis National Forest (USFS trail geometry isn't mapped).
Where to stay near Salmon-Challis National Forest
Find hotels, cabins, and vacation rentals near Salmon-Challis National Forest — plan your ride.
Top-rated places to stay near Salmon-Challis National Forest
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Riding Salmon-Challis National Forest?
Trail-access updates and trip ideas by email.
More trails in Salmon-Challis National Forest
80.4 mi · Advanced grade
31.7 mi · Advanced grade
29.8 mi · Advanced grade
20.9 mi · Advanced grade
20.8 mi · Advanced grade
18.7 mi · Advanced grade